{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-31741",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-03-09T15:48:24.138Z",
        "datePublished": "2026-05-01T14:14:36.845Z",
        "dateUpdated": "2026-05-11T22:14:51.833Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:14:51.833Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncounter: rz-mtu3-cnt: prevent counter from being toggled multiple times\n\nRuntime PM counter is incremented / decremented each time the sysfs\nenable file is written to.\n\nIf user writes 0 to the sysfs enable file multiple times, runtime PM\nusage count underflows, generating the following message.\n\nrz-mtu3-counter rz-mtu3-counter.0: Runtime PM usage count underflow!\n\nAt the same time, hardware registers end up being accessed with clocks\noff in rz_mtu3_terminate_counter() to disable an already disabled\nchannel.\n\nIf user writes 1 to the sysfs enable file multiple times, runtime PM\nusage count will be incremented each time, requiring the same number of\n0 writes to get it back to 0.\n\nIf user writes 0 to the sysfs enable file while PWM is in progress, PWM\nis stopped without counter being the owner of the underlying MTU3\nchannel.\n\nCheck against the cached count_is_enabled value and exit if the user\nis trying to set the same enable value."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/counter/rz-mtu3-cnt.c"
                    ],
                    "versions": [
                        {
                            "version": "0be8907359df4c62319f5cb2c6981ff0d9ebf35a",
                            "lessThan": "885aa739a07ab45e90dfa997205acec97979ce4e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0be8907359df4c62319f5cb2c6981ff0d9ebf35a",
                            "lessThan": "ced8b48420eddb1251f93c22dc23fa136490b3cd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0be8907359df4c62319f5cb2c6981ff0d9ebf35a",
                            "lessThan": "e07237df8538b0ae98dce112e4f6db093d767f80",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0be8907359df4c62319f5cb2c6981ff0d9ebf35a",
                            "lessThan": "f5f6f06d7e6d262026578b59ba7426eb04acce5d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0be8907359df4c62319f5cb2c6981ff0d9ebf35a",
                            "lessThan": "67c3f99bed6f422ba343d2b70a2eeeccdfd91bef",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/counter/rz-mtu3-cnt.c"
                    ],
                    "versions": [
                        {
                            "version": "6.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.4",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.134",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.81",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.22",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.12",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.6.134"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.12.81"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.18.22"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.19.12"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/885aa739a07ab45e90dfa997205acec97979ce4e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ced8b48420eddb1251f93c22dc23fa136490b3cd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e07237df8538b0ae98dce112e4f6db093d767f80"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f5f6f06d7e6d262026578b59ba7426eb04acce5d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/67c3f99bed6f422ba343d2b70a2eeeccdfd91bef"
                }
            ],
            "title": "counter: rz-mtu3-cnt: prevent counter from being toggled multiple times",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}